David K. Joyce

Rare Minerals

Unusual and rare minerals that I felt would be better here than in some other category! :)

All prices in Canadian dollars. For payment in US$, deduct 19% or multiply by 0.81.

Click on any of the following thumbnails to view a larger image of the specimen.

Vuagnatite, McguinnessiteRare Minerals
  • Item #21935
  • Vuagnatite, Mcguinnessite
  • 6.4x5.0x2.1 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Ukiah
  • Mendocino County
    California, USA
  • The top of this plate is largely covered with transluscent, white-colourless vuagnatite crystals (some very sharp!) and green, hemispheres of greenish mcguinnessite. Nice combination!
Colemanite, TodorokiteRare Minerals
  • Item #21920
  • Colemanite, Todorokite
  • 5.5x5.0x3.9 cm
  • Largest Crystal Size: c-3mm, t-micro
  • $35.00
  • Twenty Mule Team Canyon
  • Death Valley
    California, USA
  • What a great locality name! History! Also very nice crystals of this boron-rich mineral, associated with botryoidal/dendritic todorokite in cavities on the side of the specimen!
MerwiniteRare Minerals
  • Item #21931
  • Merwinite
  • 5.5x3.2x1.4 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Crestmore Quarry
  • Riverside County
    California, USA
  • Whitish crystals of this unusual calc-silicate mineral are embedded in this piece. Unusual.
ZunyiteRare Minerals
  • Item #21926
  • Zunyite
  • 6.6x4.3x2.8 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Big Bertha Mine
  • Quartzite
    Arizona, USA
  • This fragment of quartz.mica matrix contains many hundreds of colourless to beigey zunyite crystals. The crystals are very well formed and are, generally, combinations of cube and octahedron with the octahedron dominating some times. Rich sample with many sharp crystals.
CornubiteRare Minerals
  • Item #21932
  • Cornubite
  • 3.5x2.9x2.2 cm
  • Largest Crystal Size: micro
  • $55.00
  • Hardshell Mine
  • Santa Cruz County
    Arizona, USA
  • Lots of tiny, green crystals of this rare copper arsenate in and on the gossanous matrix of this piece.
RaiteRare Minerals
  • Item #21959
  • Raite
  • 3.8x2.8x2.0 cm
  • Largest Crystal Size: micro
  • $65.00
  • Indian Mountain
  • Kola Peninsula
  • There are many open spaces in this matrix that reveal beautiful crystal sprays of the rare Sodium-manganese-titanium silicate raite. There are supposed to be zorite crystals(?) in the cavities as well but I cannot recognize them. Maybe you can?! Very nice raite!
CarparthiteRare Minerals
  • Item #21937
  • Carparthite
  • 7.0x6.0x5.1 cm
  • Largest Crystal Size: 6mm
  • $65.00
  • Picacho Mine
  • San Benito Co.
    California, USA
  • This specimen has some openings that contain yellowish crystals of this unusual mineral that is composed of just carbon and hydrogen! Some nice crystals here!
StrengiteRare Minerals
  • Item #21945
  • Strengite
  • 4.3x2.5x1.6 cm
  • Largest Crystal Size: 0.5mm
  • $40.00
  • Indian Mountain
  • Cherokee County
    Alabama, USA
  • Beautiful well formed crystals are present both on the darker oxide matrix and as thicker covering on the other side of the specimen. Not all crystals are undamaged but there are many that are perfect and excellent for photography!
KleiniteRare Minerals
  • Item #21951
  • Kleinite
  • 5.8x3.0x3.2 cm
  • Largest Crystal Size: 1.5mm
  • $65.00
  • McDermit
  • Humboldt County
    Nevada, USA
  • Much of the front of this specimen is covered with rough but coherent crystals of kleinite. When I fist saw this mineral, I thought perhaps it was a uranium mineral, it is so yellow. No, it is a mercury mineral. Rare!
CornwalliteRare Minerals
  • Item #21952
  • Cornwallite
  • 8.5x3.1x1.7 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Majuba Hill
  • Pershing County
    Nevada, USA
  • There are a number of cavities on this specimen lined with deep green cornwallite. There is a light green phase coating the darker green phase, as well, in the largest opening. I'm not sure if that is also cornwallite. There are two deep blue clinoclase crystals on the light green phase on top of the specimen. Great locality!
Felsobanyaite, GypsumRare Minerals
  • Item #21955
  • Felsobanyaite, Gypsum
  • 3.7x2.8x2.8 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Chickerell
  • Dorset
  • OK, it is not pretty! It IS unusual, though! White aggregates of this unusual aluminum sulfate mineral intermixed with elongated growths of gypsum. Was labelled originally as "basaluminite", which is a pseudonym for felsobanyaite. Unusual!
NormanditeRare Minerals
  • Item #21958
  • Normandite
  • 4.5x4.0x2.4 cm
  • Largest Crystal Size: 14mm
  • $85.00
  • Kola Peninsula
  • This specimen shows several sprays of deep red-brown normandite embedded in matrix. I have seen many specimens of astrophyllite labelled normandite but this is not one. I've examined it closely and am convinced that it is normandite. Rich specimen of this rare mineral!
UssingiteRare Minerals
  • Item #21961
  • Ussingite
  • 4.7x4.3x3.2 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Mt. Punkurauj
  • Chibiny Massif, Kola Peninsula
  • A fragment of massive ussingite ranging from light mauve to purple. Rich!
TugtupiteRare Minerals
  • Item #21976
  • Tugtupite
  • 5.7x4.0x3.5 cm
  • Largest Crystal Size: 5mm
  • $75.00
  • Kvanefjeld
  • Ilimaussaq
  • Patches of pinkish tugtupite are scattered throughout the entire volume of this matrix. The tugtupite fluoresces a nice orange-pink colour as you can see from the pics. Very good example!
NesquehoniteRare Minerals
  • Item #21977
  • Nesquehonite
  • 6.7x6.1x1.6 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Ferrieres
  • Tarn
  • Rounded aggregates of this mineral look to be efflorescing out of a sedimentary matrix. Fluoresces a yellow-green colour!
ArrojaditeRare Minerals
  • Item #21979
  • Arrojadite
  • 8.0x5.9x1.1 cm
  • Largest Crystal Size: 4mm
  • $110.00
  • Rapid Creek

  • Yukon, Canada
  • A plate of crystals of both quartz and arrojadite. The arrojadite crystals are sharp, well formed crystals that cover 40-50% of the top of this plate with quartz crystals covering the rest. Nice!
TellurobismuthiteRare Minerals
  • Item #21991
  • Tellurobismuthite
  • 5.6x5.1x3.5 cm
  • Largest Crystal Size: 2mm cleavage
  • $45.00
  • Fyresdal

  • Norway
  • Lots of bright, lustrous cleavages of this unusual telluride scattered throughout this quartz matrix. Rich!
Brewsterite, BaryteRare Minerals
  • Item #21992
  • Brewsterite, Baryte
  • 3.5x3.4x2.2 cm
  • Largest Crystal Size: 2mm
  • $35.00
  • Strontian
  • Argyllshire
  • This thick plate has its top covered with white crested baryte crystals which have a generous sprinkling of sharp brewsterite crystals. There is sphalerite or wurtzite embedded in the matrix. From the type locality!
TrolleiteRare Minerals
  • Item #2007
  • Trolleite
  • 3.6x4.2x3.0 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Mono County
    California, USA
  • Massive, light blue trolleite. Just a very good example of this unusual mineral!
SvabiteRare Minerals
  • Item #22008
  • Svabite
  • 4.0x4.8x4.5 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Langban

  • Sweden
  • An excellent example of this unusual calcium fluoro-arsenate.
XonoliteRare Minerals
  • Item #22048
  • Xonolite
  • 6.8x6.0x2.8 cm
  • Largest Crystal Size: 10mm`
  • $45.00
  • N'Chwaning Mine
  • Kuruman
    South Africa
  • Here is an interesting accessory mineral from this famous manganese mining field. Pure-white aggregates of silky xonotlite crystals crammed into vein-lets and interstices in this piece. Excellent example of this unusual mineral! r
ProbertiteRare Minerals
  • Item #22075
  • Probertite
  • 6.0x4.5x2.6 cm
  • Largest Crystal Size: 25mm
  • $75.00
  • Boron
    California, USA
  • Well, there is lots of probertite in the world but not too many of this calibre. Radiating, white acicular crystals. The specimen is mostly composed of probertite, as far as I can see! Nice! r